Diabetics can lower their blood sugar by eating more foods that contain the mineral zinc, according to studies, since zinc has been shown to be essential to insulin action, as well carbohydrate metabolism. The simple truth is, we’re all zinc deficient, according to a worldwide analysis. A whooping one third of people worldwide don’t get the zinc they need from diet. In fact, dietary zinc deficiency, often called marginal zinc deficiency, is quite common in the developing world, affecting an estimated 2 billion people, according to the Linus Pauling Institute